code: def test_show_empty(dvc):
      assert dvc.params.show() == {"": {"data": {}}}
  
file_path: dvc/tests/func/params/test_show.py
imports: from os.path import join
  import pytest
  from dvc.repo import Repo
  from dvc.repo.stage import PROJECT_FILE
label_desc: Use image node_id 1 for calling a global function with example usage: test_show_empty(dvc) without return types